Unseen history on Instagram: "In 2015, the Ice Bucket Challenge became a massive viral sensation, with celebrities from all over the world joining in to raise awareness and funds for ALS (Amyotrophic Lateral Sclerosis), also known as Lou Gehrig’s disease. The challenge involved dumping a bucket of ice-cold water over one’s head, filming it, and then nominating others to do the same — all within 24 hours or donate to the ALS Association. Stars like Taylor Swift, Justin Bieber, Oprah Winfrey, Chri